diff --git a/requirements-dev.in b/requirements-dev.in
index 2ffc5488..53a7586c 100644
--- a/requirements-dev.in
+++ b/requirements-dev.in
@@ -1,6 +1,6 @@
 # Run `make up-reqs` to update pinned dependencies in requirement text files
 
-flake8==3.5.0 # flake8 3.6.0 is giving erroneous "W605 invalid escape sequence" errors.
+flake8==3.8.4 # flake8 latest version
 pre-commit
 invoke
 twine
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 5b4c4fe4..1a9980b7 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -15,9 +15,9 @@ cryptography==3.2.1       # via secretstorage
 distlib==0.3.0            # via virtualenv
 docutils==0.16            # via readme-renderer
 filelock==3.0.12          # via virtualenv
-flake8==3.8.0             # via -r requirements-dev.in
 identify==1.4.14          # via pre-commit
 idna==2.9                 # via requests
+flake8==3.8.4             # via -r requirements-dev.in
 invoke==1.4.1             # via -r requirements-dev.in
 jeepney==0.4.3            # via keyring, secretstorage
 keyring==21.2.0           # via twine